conception date!

I know this may seem like a silly question but how do I figure out my conception date? At NT scan today, baby measured at 12w2d, do I just count back 12w2d? I just need an easy to understand explanation. Trying to figure out when we conceived since my cycle is irregular and I have no idea when I ovulated.

Thank you!

Ps. So happy WTE app for iPhone is finally working again!

I know this may seem like a silly question but how do I figure out my conception date? At NT scan today, baby measured at 12w2d, do I just count back 12w2d? I just need an easy to understand explanation. Trying to figure out when we conceived since my cycle is irregular and I have no idea when I ovulated.

It usually dates from the first day of your last period... So when you conceived you were already 2 weeks pregnant (or so it works out) - I think that's right anyway, somebody feel free to jump in and correct me if I'm wrong!

You said you have the iPhone? I have an app on mine that tells me when I conceived from my due date, it's called 'I'm expecting' it's a purple pic with a baby and a butterfly, when you've filled all your info in on the main page it will tell you. Hope that helps!

It usually dates from the first day of your last period... So when you conceived you were already 2 weeks pregnant (or so it works out) - I think that's right anyway, somebody feel free to jump in and correct me if I'm wrong!

You said you have the iPhone? I have an app on mine that tells me when I conceived from my due date, it's called 'I'm expecting' it's a purple pic with a baby and a butterfly, when you've filled all your info in on the main page it will tell you. Hope that helps!

Without knowing when you ovulated, it's harder to predict. Even with a positive OPK, there is still a 24-48 hour window. Most doctors will go by your LMP. They consider conception to take place 2 weeks after the start of your last cycle. This is just a best guess though. Every woman has a unique cycle, the LMP method is just based on averages. I believe they use a 28 day cycle when calculating.

Without knowing when you ovulated, it's harder to predict. Even with a positive OPK, there is still a 24-48 hour window. Most doctors will go by your LMP. They consider conception to take place 2 weeks after the start of your last cycle. This is just a best guess though. Every woman has a unique cycle, the LMP method is just based on averages. I believe they use a 28 day cycle when calculating.

DH and I had sex on Jan 30th and then nothing until 2 weeks later. It would be safe to assume that LO was conceived anywhere from Jan 30-Feb 2nd? I just need to find a good book and educate myself on these things! Thank you, all!

DH and I had sex on Jan 30th and then nothing until 2 weeks later. It would be safe to assume that LO was conceived anywhere from Jan 30-Feb 2nd? I just need to find a good book and educate myself on these things! Thank you, all!

How is that? She's missing half of the equation here. She knows when she had sex, but she stated in her OP that she has no clue when she ovulated.

If she had sex on the 30th and ovulated that same day, chances would be high that she would have a boy. However, if she didn't ovulate until the 1st or the 2nd, then the odds would be in her favor to have a girl. Without having that information it's pretty impossible to predict gender.

This is why conception dates are so tricky to figure out, and why most doctors make an educated guess based on your LMP and an average 28 day cycle.

How is that? She's missing half of the equation here. She knows when she had sex, but she stated in her OP that she has no clue when she ovulated.

If she had sex on the 30th and ovulated that same day, chances would be high that she would have a boy. However, if she didn't ovulate until the 1st or the 2nd, then the odds would be in her favor to have a girl. Without having that information it's pretty impossible to predict gender.

This is why conception dates are so tricky to figure out, and why most doctors make an educated guess based on your LMP and an average 28 day cycle.

Praying for a boy as I have a 17 month old DD. Hoping I ovulated on the 30th or even the 1st. But is there scientific truth to the prediction of gender depending on ovulation? I know that male sperms die off sooner vs female sperms being the longer lasting ones. Something else to read up on. Thank you for all your help!

Praying for a boy as I have a 17 month old DD. Hoping I ovulated on the 30th or even the 1st. But is there scientific truth to the prediction of gender depending on ovulation? I know that male sperms die off sooner vs female sperms being the longer lasting ones. Something else to read up on. Thank you for all your help!

Based on a due date of October 27th which has been determined by an ultrasound, she most likely ovulated on February 3rd. Since she had sex on January 30th, that is clearly a few days before ovulation. If she would have asked the ultrasound tech what her conception date was, they would have told her February 3rd based on her due date aka baby's measurements.

Based on a due date of October 27th which has been determined by an ultrasound, she most likely ovulated on February 3rd. Since she had sex on January 30th, that is clearly a few days before ovulation. If she would have asked the ultrasound tech what her conception date was, they would have told her February 3rd based on her due date aka baby's measurements.

Jdawn & Cupcake: one last question to bother you two with. Does this truly determine the gender (even to some extent)? I know the female sperm lives up o 5 days vs the male which can live up to 3 days. As I said earlier, had sex on the 30th, borderline 31st since it was closer to midnight. I guess I'm just trying too hard to predict the gender when I should just wait patient until the u/s at 16-20 weeks :)

Thanks again!-impatient one

Jdawn & Cupcake: one last question to bother you two with. Does this truly determine the gender (even to some extent)? I know the female sperm lives up o 5 days vs the male which can live up to 3 days. As I said earlier, had sex on the 30th, borderline 31st since it was closer to midnight. I guess I'm just trying too hard to predict the gender when I should just wait patient until the u/s at 16-20 weeks :)

I totally get the impatience thing. I was using OPK's when we conceived, and I have been doing tons of research to make my best guess on gender. It's fun to talk about it with other women! I figure I won't get another scan for at least a month.

Sadly, it's never 100% But, people that follow the Shettles Method claim up to 90% accuracy. Here's a link to the wiki.

I totally get the impatience thing. I was using OPK's when we conceived, and I have been doing tons of research to make my best guess on gender. It's fun to talk about it with other women! I figure I won't get another scan for at least a month.

While it is very accurate, it's not 100%. I have a friend who is pregnant and she had sex on the exact day she ovulated (her periods are every 28 days, like clockwork) so she was pretty sure she was pregnant with her 4th and final boy! But, she was pleasantly surprised to find out she has a healthy little girl in there :)

While it is very accurate, it's not 100%. I have a friend who is pregnant and she had sex on the exact day she ovulated (her periods are every 28 days, like clockwork) so she was pretty sure she was pregnant with her 4th and final boy! But, she was pleasantly surprised to find out she has a healthy little girl in there :)

Thanks for the link! Hate to be a Debbie Downer for those that do believe in the Shettle's theory but I pray this doesn't fall true for me. Im really hoping for a boy. I unsuccessful used OPK also but it never tested positive and life resumed for me. Only to take a pregnancy test a few weeks later to delightfully read positive!

You're right! It's all in good fun. I'll be just as happy with either gender as long as LO is healthy! Lucky you! I have to wait until June to find out the gender. Even with DD keeping me so very busy, I'm finding myself even more anxious with this gender game.

Thanks for the link! Hate to be a Debbie Downer for those that do believe in the Shettle's theory but I pray this doesn't fall true for me. Im really hoping for a boy. I unsuccessful used OPK also but it never tested positive and life resumed for me. Only to take a pregnancy test a few weeks later to delightfully read positive!

You're right! It's all in good fun. I'll be just as happy with either gender as long as LO is healthy! Lucky you! I have to wait until June to find out the gender. Even with DD keeping me so very busy, I'm finding myself even more anxious with this gender game.

With that being said, the method was true for my first two kids! With my son we had sex on the day of ovulation, and with my daughter we had sex 3 days before. With this one, it was iffy because I conceived on January 9th and we had sex the 5th, 7th, 8th, and 10th. We didn't try for a specific gender this time since we have one of each. I had an ultrasound at 15 weeks that showed we are expecting a boy though! So I'm guessing the 8th or 10th was the lucky time, lol :)

With that being said, the method was true for my first two kids! With my son we had sex on the day of ovulation, and with my daughter we had sex 3 days before. With this one, it was iffy because I conceived on January 9th and we had sex the 5th, 7th, 8th, and 10th. We didn't try for a specific gender this time since we have one of each. I had an ultrasound at 15 weeks that showed we are expecting a boy though! So I'm guessing the 8th or 10th was the lucky time, lol :)

There was another thread similar to this where a poster brought up an interesting point/theory about gender determination. She mentioned that you also have to take into consideration the ratio of the sperm being produced by the father. More female sperm might give them better odds, and vice-versa, regardless of all the other factors.

Sometimes thinking about it all makes my head spin a little. It also makes me think about what a miraculous thing is happening inside of me! :)

Well, as Cupcake pointed out, there's always a chance!

There was another thread similar to this where a poster brought up an interesting point/theory about gender determination. She mentioned that you also have to take into consideration the ratio of the sperm being produced by the father. More female sperm might give them better odds, and vice-versa, regardless of all the other factors.

Sometimes thinking about it all makes my head spin a little. It also makes me think about what a miraculous thing is happening inside of me! :)

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